The time is the Late Napoleonic Wars.

The undead have swept across the world. Europe is slowly losing its grip, Africa is gone, and Asia is holding fast. And the Americas have concerned themselves with their own safety. The plage began when explorers tore open unknown tombs in the Pyramids of Giza, only to find a terrible thing. On exactly 2 months ago when the plague began, it said Hell then would be full. And on that same day, the plague broke out.